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C. KNUDSEN.

VALVE EOE STEAM ENGINES.

No. 572,608. Patented Deo. 8, 1896.

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`GQKlvUDsBbI. VALVE FOR STEAM ENGINES No. 572,608. A Patented Deo. 8,1896.

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.0. KNUDSBNV VALVE POR STEAM ENGINES.

' No. 572,608. Patented Deo. 8, 1896.

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UNITED STATES PATENT OEEICE.

CONRAD KNUDSEN, OF BOUND BROOK, NEW JERSEY, ASSIGNOR TO THE AMERICANENGINE COMPANY, OF SAME PLACE.

VALVE FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No'. 572,608, datedDecember 8, 1896.

Application filed April l0, 1896.

within the steam-chest a slide-valve which has a uniform longitudinalreciprocation, and within this valve is located an inner or cut-offvalve which has no longitudinal reciprocation, but simply at the propertime a vertical transverse reciprocation, the exact time at which thiscut-off valve is to act being variable and under the control of thegoverning devices. The form and construction of both the slide-valve andthe cut-off valve are new and constitute a part of the presentinvention, which in its broader scope is not limited to details ofconstruction except as hereinafter described, and pointed out in theclaims.

The invention will be more fully understood from the detaileddescription hereinafter presented, reference beinghad to theaccompanying drawings, in which- Figure l i-s a side elevation of asteam-chest containing slide and cut-off Valves constructed inaccordance with and embodying the invention, the outer face of thestealn-chest being removed and the outer portions of the slide andcut-ofi valves being partly broken away and in section for clearness ofillustral tion. Fig. 2 is a central horizontal longitudinal section ofsame on the dotted line 2 2 of Fig. l. Fig. 3 is a vertical transversesection through a portion of same on the dotted line 3 3 of Fig. 2; andFig. 4 is a detached perspective view of one of the cut-off valves.

In the drawings, A designates the steamcylinder, B the steam-chest, andC the customary piston.

The longitudinally-reciprocating slidevalve within the steam-chest B isdesignated by the letter D, and the cut-0E valves within the oppositeheads F F of the slide-valve D Serial No. 586,905. (No model.)

are indicated by the letters E E. The valve D is composed of thecorresponding heads FF, which are connected by the rods F' and valve-rodG and are located at opposite ends of the steam-chest B. v

The form of the steam-chest B and the relation of the heads F F,composing the reciprocating valve D, are clearly illustrated in Figs. 1and 2, in which it will be seen that the valve-chest is provided with achamber B at each end for the respective heads F F, and that thesechambers are connected by the cylindrical casting II, in which isprovided the inlet Il for steam. The steam entirely fills the chamberformed by the casting II and also that portion of the chambers B betweenthe heads F F. The outer ends of the chambers B connect with the usualexhaust X. The heads F F, being connected together and also to thevalve-rod G, have a simultaneous movement in line with the length of thevalvechest, and each of said heads has within it a cut-oit valve E,which travels with its head F, but has at the proper time an operationindependent of said head under the axial rotation of the valve-rod G.The head F, With its cut-0E valve E, at one end of the valvechest is aduplicate of the head F and cut-olf valve E at the other end of thevalve-chest.

Each head F is composedV of the vertical frames lettered J K,respectively, which are connected together by the bolts L, and arerespectively provided with the transverse ports M N. The edges of theframes .I K adjacent to the steam-cylinder are formed with the iianges OP, which, when said frames are brought together, meet each other, andthe whole then forms a head or frame having three sides which receivethe cut-oft valve E. The open side of the frame or head formed by thecastings .I K has its` opposite edges properly separated by the sleevesQ on the bolts L. The cut-oit valve E is in one piece and formed of theopposite sides R S, provided with the slots or ports T and connected bythe lugs V and bar W, the purpose of the latter being to receive thecrank by which the cut-ott valve E is given a vertical transverse motionwithin the head F for the purpose of throwing the ports or slots T ofsaid cut-oit valve into or out of alinement with the IOO like ports M N,formed in the side frames J K of said head F. The side frames J K of thehead F are provided with the central apertures to receive the valve-rodG, and at its inner edges the cut-off valve E has its sides cut away toform the recess Y through which the said valve-rod passes. Vithin thespace formed between the opposite sides of the cutoit valve E in eachhead F there is provided upon the valve-rod G the crank a, the form lofwhich is more clearly illustrated in Fig. 3, in which it will be seenthat this crank is composed of a block of metal slit at one side leadingto the valve-rod G in order that it may be clamped upon the said rod bymeans of a bolt or screw b, and that said crank at its outer end isbifurcated or provided with the recess c, which passes upon and engagesthe bar W, formed between the opposite sides of the said cut-ott' valveE. The crank a 4when adj usted and secured upon the valverod G is rigidthereon, and hence when the valve-rod is given an axial movement thecrank a, acting through the said bar WV, will elevate or depress thecut-olii' valve E and thereby throw the ports or slots T therein into orout of alinement with the like ports MjN in the opposite sides of thehead F. The crank a snugly fits between the inner surfaces of the sidesof the cut-off valve E, as illustrated in Fig. l, and hence when thevalve-rod G is given a direct reciprocating motion it will move with itthe heads F and cut-off valve E.

The ports or slots T in the cut-off valve E extend entirelyT through theopposite sidesof said cut-ott valve, as shown in Figs. l and 4, but theports M N in the opposite sidesof the head F do not extend entirelythrough the said sides, but, as illustrated in Fig. 2. lead into innerchambers CZ c, formed within the opposite sides of the head F, and whichat their meeting ends merge into the outletport f, which at the propertime is brought into alinement with or removed from the port g, leadingdirectly into the steam-cylinder A.

Vhen the two sides J K of the head F are brought together and secured bythe bolts L, they form a rigid head F, whose exterior opposite sideshave closed` solid surfaces, but whose inner opposite sides contain theports M N, which lead to the chambers d c, and thence through the port finto the port g, communicating directly with the steam-cylinder. Thelive steam which completely iills the steam-chest between the heads F Ffreely passes into the spaces between the opposite sides of the cut-offval-ves E E and around the cranks a, and hence when the port f of onehead F is in communication with a port g at the end of thesteam-cylinder the steam will enter said cylinder so long only as theports or slots T in the cut-off valve E are in register with the slots MN in said head F, and when said cut-off valve is either raised orlowered to throw its ports or slots T out of alinement with the ports MN in the head F the live steam will be prevented from reaching the portf and hence will be excluded from the cylinder A. The directreciprocating motion of the valve-rod G brings the port f intocommunication with the port g, or cuts off such communication, while theaxial movement of said rod G determines the point at which the valve Eshall cut off the steam from the cylinderA, as above described. The headF at the right-hand end of the steam-chest is a counterpart of the headF at the left-hand end of said chest, and the cut-off valves E areduplicates of one another. The cranks a are also duplicates of oneanother, but will be arranged upon the valve-rod G at an angle to oneanother, as indicated in Fig. l, in order that when one cut-.off valveEis moving downward the other cut-off valve E will move upward. lt hasbeen described above that the axial motion of the valve-rod acts,through the cranks a, to operate the cut-off valves E. When the cut-offvalveE at the left-hand end of the steam-chest is moving downward toclose the ports M N in its head F, the valve E at the right-hand end ofthe steam-chest will move upward to open the ports M N in its head F,and hence it will be understood that when one cut-oft valve is inposition to admit steam into the ports M N of its head the other cut-oitvalve will close the ports M N of its head. The heads FF, composing theslidevalve, have a simultaneous and uniform longitudinal reciprocation,while the cut off IOO valves E E have simply, with respect to theirseats and cooperating ports, a vertical reciprocation. The verticalreciprocation of the cut-off valves E E is variable as to time of actionunder the control of the governing devices, while the traverse of theheads F F,co1n posing the slide-valve, is invariable.

The valvegear for operating the slidevalve and cut-off valves will bc ofany suitable character, and as disclosing an example of satisfactorygear for this purpose attention is called to Letters Patent of theUnited States No. 385,533, granted to Elijah F. Spaulding on July 3,1888. The present invention is not coniined, however, to any special'for-m or construction of the valvegear. lt is essential, however, thatthe action of the cut-off valves in cutting off the steam from thecylinder A be variable, in order that the steam may be cut off from saidIIO cylinder at the desired moment under control of the governingdevices. When, for illustration, the port f of the right-hand head F isin line with the port g, leading tothe righthand end of the cylinder A,the cut-oft valve E of said head will have its slots` or ports T inalinement with the ports M N of said head F, and at such time and duringthe desired period steam will pass through said slots or ports T andports M N into the` chambers CZ c, and thence tothe said port f and portg, leading into the right-hand end ot' the cylinder A. At such time thesteam at the left-hand end of the cylinder A will be enabled to exhaustthrough its port g and the outer end of the left-hand compartment orchamber d into the usual exhaust X. After the proper quant-ity of steamhas entered the right-hand end of the cylinder A the cut-oif valve E atsaid end will move to bring its solid side portions over the ports M Nof the right-hand head F, thus cutting off the steam, this being, as totime, variable under the control of the governing devices. The operationof the head F and cut-off valve E at the left-hand end of thesteam-chest is the same as that of the head and cut-off valve at theright-hand end of said chest. The form of connection between thevalve-rod G and the cut-olf valves E E is such that the said rod mayimpart to the heads F the usual reciprocating motion and at the sametime receive an axial oscillation by which it, the said valve-rod, isenabled, through the cranks a, to impart a vertical reciprocating motionto the cut-off valves. The cut-off valves do not preferably have asudden movement, but a gradual vertical reciprocation during thelongitudinal movement of the heads F F. The steam filling the c entralportions of the steam-chest is prevented from reaching the exhaust bythe packingstrips A', secured in grooves in the frames J, composing theouter portions of the heads F F.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a steam-en gine the reciprocating slidevalve composed of theconnected heads comprising the sections J, K, having` at their innerfacing sides the ports IWI, N, and provided with the interior chamberscl, e, leading to the outlet-port f, combined with the cut-off valveslocated between said frames J, K, and provided in their opposite sideswith the ports or slots T adapted to be brought into or out of alinementwith the said ports M, N, and means for reciprocating said headslongitudinally and said cuto valves transversely; substantially as setforth.

2. In a steam-en gine the reciprocating slidevalve composed of theconnected heads comprising the frame or sections J, K, having in theirfacing sides the ports M, N, and provided with the chambers d, c,leading to the outlet-portf, combined with the cut-off valves E composedof the opposite slotted sides connected together by lugs and adapted tomove against the facing sides of said heads, the

valve-rod for reciprocating `said heads, and the cranks on saidvalve-rod engaging said cut-off valves and adapted to impart to the samea transverse reciprocating motion; substantially as set forth.

3. In a steam-engine the reciprocating slidevalve composed of theconnected heads comprising the frames or sections J, K, having the portsM, N, in their facing sides, and provided with the interior chambers d,e, leading to the outlet-port f, combined with the cut-oif valveslocated between said facing sides and provided with the slots or portsT, the valve-rod connected with said heads, and the cranks a securedupon said valve-rod and engaging said cut-off valves, said cranks beingslit in line With said valve-rod and provided with the tightening-boltand also with the recesses which engage said cut-off valves;substantially as set forth.

4. In a steam-engine the reciprocating slidevalve composed of theconnected heads comprising the frames or sections J, K, having the portsM, N, in their facing sides and provided with the interior chambers d,e, leading to the outlet-port f, combined with the cut-oft' valves Ecomposed of the slotted sides having the recesses Y and connectedtogether by the cross-bars W, the valve-rod passing through said headsand the recesses Y of said cut-off valves, and the cranks a secured uponsaid valve-rod and provided with recesses engaging said cross-bars;substantially as set forth.

5. In a steam-engine the reciprocating slidevalve composed of theconnected heads containing in their facing sides the series of ports M,N, leading to an outlet-port j", combined with the cut-off valveslocated between said facing sides and having in their opposite sides theports or slots T adapted to be brought into or out of alinement withsaid ports M, N, and means for longitudinallyreciprocating saidslide-valve and transversely reciprocat- A ing said cutoff valves;substantially as set forth.

Signed at New York, in the county of New York and State of Neur York,this 6th day of April, A. D. 1896.

CONRAD KNUDSEN.

Witnesses:

CHAs. C. GILL, E. Jos. BELKNAP.

IOO

